Work-holder.



0. B. GROSS.

WORK HOLDER.

APPLICATION FILED JUNns, 1907.

1,082,588. Patented Dec. 30, 1913.

WITNESEEE:

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timrnn STATES PATENT enrich.

OWEN B. GROSS, OF AURORA, ILLINOIS.

WORK-HOLDER.

To all whom it may concern Be it known that I, OWEN B. Gnoss, a citizenof the United States, residing at Aurora, in the county of Kane andState of Illinois, have invented certain new and useful Improvements inWork- Holders, of which the following is a specification.

My invention relates to work holders and refers particularly toappliances adapted to be attached to drill presses and similar machinesfor the purpose of holding work and especially for gripping the stockupon which work is being done.

The chief objects of my invention are to provide an appliance that canbe readily attached to the bed of a machine for the purpose of holdingfirmly any ordinary piece of work; that can be readily adjusted to beadapted to grip pieces of irregular form, and that will hold the stocksecurely during all operations thereon.

Further objects of my improved device are to furnish a pivotalattachment for the appliance, in its relation to the machine bed wherebyit will be free to be moved about such center for the purpose ofadjusting the work to the tool axis, and having means for convenientlylocking the apparatus when adjusted; to produce a work holder that willhave an unusual range of application, and to provide a strong anddurable clamping device so designed that the mechanical movements willbe conveniently controlled and that will enable the work to be handledmore expeditiously and effectively than with earlier forms of suchdevices.

I accomplish the above and other important points by the employment ofthe mechanism illustrated in the accompanying drawing which forms a partof this specification and in which Figure 1 is a side elevation of myimproved appliance showing method of at taching it to the bed plate of amachine with the parts 39, 40 and 4:1 removed; Fig. 2 is a top planview; Fig. 3 is a sectional view on the line 33 of Fig. 2; Fig. 4 is aper spective view of a support used especially in drilling; Fig. 5 is aside elevation of one of the clamping screws with attached wrench, andFig. 6 is a perspective view of a jig for holding rods and similarturret pieces.

Referring to the drawing in detail, the numeral 10 indicates a baseplate having downwardly turned marginal flanges 11 Specification ofLetters Patent.

Application filed June 6,

Patented Dec. 3&9, 1913. 1907. Serial No. 377,540.

j which rest upon the bed 12 of the machine I and support said plateabove the bed face. About the middle third of the plate 10 the marginsare supplied with longitudinal parallel vertical flanges 13 and adjacentthereto is a transverse wall or flange 14 which rises from the surfaceof the plate and extends entirely across from one side of the plate tothe other. The flanges 11. 13, and the wall 14 are formed integral withthe plate and the flanges 13 and wall 1 1 form three sides of arectangular box, which forms the working area of the apparatus. In orderto afford a pivotal connection with the bed plate 12, a square post 15has projecting from the inner side a lug 16 which is received in a slot17 formed in a side flange 11, the lower end of the post being roundedso as to fit into any one of numerous holes 19 usually provided in thebed or drill table 12. To prevent displacement of the lug 16 its innerend is riveted or upset so that the said lug will have slidingengagement with the slot 17.

Retaining bolts 20, 21, each having a head 22 flattened upon oppositesides and furnished with threads 23 are adapted to engage longitudinalmedian slots 24 formed in each end of the plate 10, the middle of eachslot having a wider portion 25 to admit the head 22 of the bolt which isthen passed through corresponding suitable slots in the bed of themachine. One of these bolts is furnished with a nut 26 to which ispivotally connected a handle or wrench 27 provided with a forked end forattachment to the said nut. The nut 28 for the companion bolt is turnedby a common wrench since an attached handle would not be so convenientowing to the location of said bolt and nut beneath an adjusting screwhereinafter described.

To the face of the plate 10 in the open side of said rectangular box isattached a post 29 having its upper end bored to form a box or nut foran adjusting screw 30 the head 31 being flattened to afl'ord a fingergrip by means of which it can be quickly turned. The thread of thisscrew is preferably of square form and the end of the body is furnishedwith a clamping or bearing block 32 with which said screw has a swivelconnection of any well known form which attaches the said block to thescrew so that it will follow the movements of the latter. To the saidblock 32 is attached a transverse clamping plate 33 which extendslaterally across said box and its ends rest upon the upper margins ofthe side flanges 13 and having sliding connection therewith being keptin apposition by a wing 3a which has a lateral flange adapted to engagegrooves 35 channeled in the outside faces of said flanges 13.

In the median line of the plate 10 the wall 14 is furnished with a setscrew 36 the head of which is supplied with an attached wrench 37 formedon the lines of the wrench 27 attached to said nut 26. The free orengaging end of said set screw has a concave face 38 to form a holdingcenter.

In Fig. 2 is shown the method of applying a detachable rest or supportfor use when small pieces or forms are to be drilled, and the device isshown detached in Fig. 4. A rectangular plate 39 fits loosely betweenthe side flanges 13 and upon its upper face are secured two plates 40,41 of thinner material, pivotally attached to the said rectangular plateby a rivet 42. The sides of the plate 40 are turned upward to formvertical flanges 40 and one of the sides of the superimposed plate 41also has a flange t1, the upper margins of the three flanges being madethe same height above the face of the plate 39.

In one of the flanges 13 is provided a threaded hole 4-3 adapted toreceive the set screw 36 which is interchangeable between the hole inthe part 14: and said hole 4:3.

A removable center 4% engages a hole 45 formed in the plate 10 withinthe said working area or box, said center, of course, being removed whenother attachments are applied.

In Fig. 6 is shown a centering block or jig as useful for holding rodsand similar pieces, the method of applying said jig being clearly shownin Fig. 1. The said block is provided with transverse and longitudinalgrooves 47, 4S and 49, which are angular in cross section.

The manner of using my improved appliance will be readily understood byany one versed in the art to which the device belongs.

The plate 39 is used in drilling, the stock and jig resting upon theupper margin of the flanges 40 41 and as the superimposed plates 40, 41,are movable laterally on their common pivot they may be shifted fromtime to time to prevent the drill from com ing in contact therewith, andthey serve an especially useful purpose in supporting the part to beoperated upon when it is thin and requires a central rest.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent, is

1. A work holder consisting of a base member and plates of relativelythin material superposed on said base member, said plates having flangesat right angles to their bottom portions, the flanges of one plate beingspaced from the flanges of the other plate, substantially in the mannerand for the purpose set forth.

2. A work holder consisting of a base member, a plate pivotally mountedon said base member, said plate having parallel marginal flanges alongits opposite sides, a second plate superposed on said first plate andpivotally mounted thereon and having a marginal flange extendingtherefrom, said plates adapted for independent adjustment. In testimonywhereof I afliX my signature in the presence of two witnesses.

OWEN B. GROSS.

Witnesses E. E. BOUSLOUGH, SHERMAN MULLEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

